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Re: Strange line in the routing table after carp failover?

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From: Charles Price <cpwp@...>
To: <misc@...>
Subject: Re: Strange line in the routing table after carp failover?
Date: Monday, December 10, 2007 - 5:49 pm

I've been looking into this some more. Are there any issues which

CARP/OpenBGPd when machines in the CARP group do not have an IP address of

their own - ie. they have only a shared CARP address?


I find that in this situation, when the CARP master fails the backup router

correctly becomes master and re-establishes BGP sessions. However, the CARP

shared IP address appears in the routing/arp table bound to the localhost

interface. This creates a really nasty routing loop.


'route -n show -inet' gives this line:

Dest            Gateway                 Flags  Refs  Use  Mtu     Interface

80.x.y.154   00:00:5e:00:01:01  UHLc  1       2      -        lo0


If I assign each router an IP address in addition to the CARP shared address,

this problem does not appear.


Thanks,


Charlie
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Messages in current thread:
Re: Strange line in the routing table after carp failover?, Charles Price, (Mon Dec 10, 5:49 pm)
Re: Strange line in the routing table after carp failover?, Henning Brauer, (Mon Dec 10, 6:41 pm)
Re: Strange line in the routing table after carp failover?, Charles Price, (Thu Dec 13, 5:06 pm)
Re: Strange line in the routing table after carp failover?, Henning Brauer, (Fri Dec 14, 3:59 am)
Re: Strange line in the routing table after carp failover?, Charles Price, (Mon Dec 10, 6:55 pm)